Question

我在文件夹上设置了filewatcher。每次创建一个子文件夹时，都会引发一个事件，我想继续这个事件并对该新文件夹中的文件做一些处理。问题是，有X个文件被复制/生成到新文件夹中，我不想执行剩下的代码，直到我知道在合理的时间内没有更多的新文件生成，假设30秒

以下是我尝试做的一些伪代码：

void fsw_Created(object sender, System.IO.FileSystemEventArgs e) //Event 

handler for directory created
{
        //Wait until no new file activity in the newly created for 30 secs
        //Do stuff
}

Answer 1

您可以使用包含 LastWriteTime 的 System.IO.DirectoryInfo 。

您可以按照以下方式使用它：

handler for directory created
 {
         string YourFolder = @"D:\CPT\Folder\"; // just en example
         DirectoryInfo di1 = new DirectoryInfo(YourFolder);
         DateTime dt1 = di1.LastWriteTime; // that is your base folder write time
         Console.WriteLine(dt1);
         Stopwatch sw = new Stopwatch(); //it's from System.Diagnostics
         sw.Restart();
         int secondWithoutAccess = 0;
         do
         {
           if (sw.ElapsedMilliseconds > 1000)
           {
           //You must create new instance of Directory info every second
           DirectoryInfo di2 = new DirectoryInfo(YourFolder);
           DateTime dt2 = di2.LastWriteTime;
           Console.WriteLine(dt2);
           //if your base lastWriteTime is lower than 
               if (dt2 > dt1)
               {
                   secondWithoutAccess = 0;
                   dt1 = dt2; // You must write last write time to proper compare
               }
               else secondWithoutAccess++;
           sw.Restart(); // in all cases You restart timer
           }
         }
         while (secondWithoutAccess < 30);  // when 30 sec without access
         Console.WriteLine("Files in folder didn't change for more than 30 sec");

        // do rest of Your stuff here
    }

C＃如何检查写入是否已在目录中完成

1 个答案: